tom sanderson is here to help us understand exactly who we are dealing with. richard, i want to start with you near turkey's border where many isis recruits are joining the fight. >> reporter: isis has gained an enormous amount of credibility and support over the last year and really over the last six months as the group has been making enormous advances in iraq. isis now calls itself the islamic state and it's starting to look like a state and act like a state of brutal medieval state but one that controls territory, one that operates across borders and one that is governori governing in its own fashion as they believe they are prisoners of war. it has been a very attractive group for extremists from europe, in particular, to join and also from around the islamic world, especially from iraq. many iraqis have been going to join up with isis once that border melted away between iraq and syria. it is believed that there are 3 to 4,000 europeans, many from the uk, hundreds at least. and this group that was holding james foley was led, in particular, by the person

we'll cover that with tom sanderson, an expert in transnational threats. let's begin with the military mission with kelly o'donnell. what's the latest? how soon do you think we could expect potential additional air strikes? >> well, at this point, krystal, it has been that first round involving two f-18s dropping two 500-pound bombs. the president's authority does give the military additional ability to act without the president having to individually green light each instance in which american fighters would be over the skies of iraq. so we don't know. it would be determined in part by the military assessments. there are 300 military advisers on the ground who are assisting the kurds and the iraqis, americans who are there to try to help with this, in part helping also with the laser-guided detection so they can guide those bombers when they do come in. so timing for a next strike is unclear. it's typical those things are not announced before they happen. more typically, we learn after a mission has been completed. it could also include additional humanit

. >> tom sanderson, am i long that the kurdish people were looking for more reinforcement from baghdadhey're not often looking for more from baghdad indicates establishment a homeland if not an independent state. going to the general's comments, not only do we not have sufficient forces to do the kind of follow-on activity there, but we can't want the success of this country more than they do in baghdad, and until there is political reform, i don't think we can expect to see much more significant military activity. >> you don't think they want success here? >> i don't think he wants to sacrifice what he needs to sacrifice in order to get success. his definition of success is different from ours. and what the iranians are willing to concede here as well is another issue. i don't think we'll have a full-scale maximum effort on the part of the united states until we see more inclusion among the different ethnic groups inside iraq. and we're not there, not even close to it. >> that of course was supposed to happen, though. it's clearly not happening, so how intransigent is maliki and what